The Lymphatic SystemThe Lymphatic System
Pick up papers on counter and group bowl outof basket.Pick up papers on counter and group bowl outof basket.
Group leaders have group in seat and quiet.Group leaders have group in seat and quiet.
You have 10 minutes to complete “Blast fromthe Past” – you picked it up yesterday” Put onpage 16 in you NEW notebook.You have 10 minutes to complete “Blast fromthe Past” – you picked it up yesterday” Put onpage 16 in you NEW notebook.
Study for possible “POP QUIZ!”Study for possible “POP QUIZ!”
Have books opened to Lymphatic Chapter andnotebooks turned to Lymphatic Unit Sheet.Have books opened to Lymphatic Chapter andnotebooks turned to Lymphatic Unit Sheet.
Scrub 11/0206Scrub 11/0206
AnnouncmentsAnnouncments
Record these in information section of notebook (page 2)Record these in information section of notebook (page 2)
Blood Mobile TomorrowBlood Mobile Tomorrow
Short HOSA Meeting todayShort HOSA Meeting today
Need to pay $1.00 by tomorrow if going to HOSAbreakfast.Need to pay $1.00 by tomorrow if going to HOSAbreakfast.
Pick up regional competition forms from Mrs. Beam.Forms plus $5.00 due by Monday, November 27th.Pick up regional competition forms from Mrs. Beam.Forms plus $5.00 due by Monday, November 27th.
Remind Mrs. Beam to talk about “Result of Smoking”Project and opportunity to be on TV on November 16th.Remind Mrs. Beam to talk about “Result of Smoking”Project and opportunity to be on TV on November 16th.
LymphLymph
Straw-colored fluid (similarto plasma)
INTERSTITIAL FLUID ortissue fluid because it is in thespaces between cells
Composed of H2O,lymphocytes, somegranulocytes, O2, digestednutrients, hormones, salts,CO2 and urea.
LymphLymph
NO red blood cells orprotein molecules (toolarge)NO red blood cells orprotein molecules (toolarge)
Carries digested food,O2 and hormones tocellsCarries digested food,O2 and hormones tocells
Carries wastes back tocapillaries for excretionCarries wastes back tocapillaries for excretion
Since the lymphaticsystem has no pump,skeletal muscle actionsqueezes lymph alongSince the lymphaticsystem has no pump,skeletal muscle actionsqueezes lymph along
Valves preventbackward flowValves preventbackward flow
Function of LymphFunction of Lymph
LYMPH –fluid thatgoesbetweencapillaryblood andtissues
Lymph flowsonly in onedirection –from bodyorgans to theheart.
Lymph VesselsLymph Vessels
Closely parallel veinsClosely parallel veins
Located in almost all tissues andorgans that have blood vesselsLocated in almost all tissues andorgans that have blood vessels
Tissue lymph enters small lymphvessels which drain into largervessels called lymphatics – theyflow into one of two large, mainlymphatics – the THORACICDUCT and right lymphatic duct.Tissue lymph enters small lymphvessels which drain into largervessels called lymphatics – theyflow into one of two large, mainlymphatics – the THORACICDUCT and right lymphatic duct.
FUNCTION OF LYMPHVESSELS – transport excesstissue fluid back into circulatorysystem. FUNCTION OF LYMPHVESSELS – transport excesstissue fluid back into circulatorysystem.
LymphDrainageLymphDrainage
THORACIC DUCT getslymph from left side ofchest, head and neck,abdominal area and lowerlimbs left subclavian vein superior vena cava heart.
RIGHT LYPHATIC DUCTgets lymph from right side ofchest, head, neck, and rightupper extremity rightsubclavian vein superiorvena cava heart.
Lymph NodesLymph Nodes
Tiny, oval shaped - size ofpinhead to size of almondTiny, oval shaped - size ofpinhead to size of almond
Some are located alone butmost are grouped(submandibular, cervical,Some are located alone butmost are grouped(submandibular, cervical,
axillary, inguinal, etc.) axillary, inguinal, etc.)
Site for white cellproduction and filter forscreening out harmfulsubstancesSite for white cellproduction and filter forscreening out harmfulsubstances
If substance can’t bedestroyed, node becomesinflamedIf substance can’t bedestroyed, node becomesinflamed
Inflamed Lymph NodeInflamed Lymph Node
Function of Lymph NodesFunction of Lymph Nodes
LYMPH NODES– producelymphocytes,filter out harmfulbacteria.
TonsilsTonsils
Masses of lymphatictissue that producelymphocytes and filterbacteria – they get smallerin size as person getsolderMasses of lymphatictissue that producelymphocytes and filterbacteria – they get smallerin size as person getsolder
PALATINE TONSILS –sides of soft palatePALATINE TONSILS –sides of soft palate
ADENOIDS – tonsils onupper part of the throatADENOIDS – tonsils onupper part of the throat
LINGUAL TONSILS -back of the tongueLINGUAL TONSILS -back of the tongue
SpleenSpleen
Sac-like mass of lymphatictissue – largest lymphoidorgan in the body
Upper left abdominal cavity,lateral to the stomach
Forms lymphocytes andmonocytes
Filters blood
Stores large amounts ofRBCs (over a pint) – contractsduring vigorous exercise orloss of blood, to release RBCs
Destroys or removes old orfragile RBCs
Thymus GlandThymus Gland
Upper, anterior thorax,above the heartUpper, anterior thorax,above the heart
Thymus is alsoconsidered anendocrine glandThymus is alsoconsidered anendocrine gland
Largest at pubertyLargest at puberty
Forms lymphocytesbefore birth involved inthe development of “T-Lymphoctes or T-Cells.”Forms lymphocytesbefore birth involved inthe development of “T-Lymphoctes or T-Cells.”
Completes is work bypuberty and is replacedby fat (this is calledinvolution)Completes is work bypuberty and is replacedby fat (this is calledinvolution)
